实现快递管理系统(序列化,网络编程)
任务要求:
加入网络编程+io处理。要求:快递数据永久存储在文件中 , 每次程序打
开加载数据. 客户端不存储任何数据, 全部传输到服务器来存储;
1.创建Express类 里面包括四个成员属性,省略了get/set/tostring等方法
public class Express implements Serializable {
private String company;//快递公司
private String number;//快递单号
private int code;//取件码
private String phone;//手机号码:使用URL知识可发送短信,本次未加入
public Express(String company, String number, int code, String phone) {
this.company = company;
this.number = number;
this.code = code;
this.phone = phone;
}
}
2.创建Express的子类,管理快递信息
包括随机取件码、录入新快递、将快递信息保存到本地、取出快递、查看所有快递等
public class Manage extends Express implements Serializable {
//设置取件码
public int addcode() throws IOException, ClassNotFoundException {
int code = 0;
Random random = new Random();
File file = new File("g:\\Express.txt");
file.createNewFile();
//当有快递信息时
if (file.length() != 0) {
//遍历文件中的快递信息 ,查询是否有相同的取件码;这里没有考虑所有取件码都被占用的情况
ObjectInputStream ois = new ObjectInputStream(new FileInputStream(file));
ArrayList<Express> list = (ArrayList<Express>) ois.readObject();
ois.close();
wh1:
while (true) {
//随机六位取件码
code = random.nextInt(900000) + 100000;
for (Express e : list
) {
if (e.getCode() == code) {
continue wh1;
}
}
return code;
}
}
//没有快递信息时
code = random.nextInt(900000) + 100000;
return code;
}
//录入快递
public ArrayList<Express> addExpress() throws IOException, ClassNotFoundException {
ArrayList<Express> list = new ArrayList<>();
Scanner input = new Scanner(System.in);
System.out.println("输入快递公司");
String company = input.next();
System.out.println("输入快递单号");
String number = input.next();
System.out.println("输入手机号");
String phone = input.next();
int code = addcode();//随机取件码
System.out.println(code);
Express express = new Express(company, number, code, phone);
list.add(express);//将快递添加到集合
return list;//返回此集合;
}
//保存快递信息到本地
public void save(ArrayList<Express> list) throws IOException, ClassNotFoundException {
File file = new File("g:\\Express.txt");
file.createNewFile();
//如果文件中有快递信息
if (file.length() != 0) {
//反序列化
ObjectInputStream ois = new ObjectInputStream(new FileInputStream(file));
ArrayList<Express> list1 = (ArrayList<Express>) ois.readObject();
ois.close();
list1.addAll(list);//将新快递信息加入
//序列化
ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(file));
oos.writeObject(list1);
oos.close();
} else {
ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(file));
oos.writeObject(list);
oos.close();
}
}
//取出快递
public StringBuffer take(int code) throws IOException, ClassNotFoundException {
StringBuffer text = new StringBuffer();
File file = new File("g:\\Express.txt");
file.createNewFile();
//反序列化
ObjectInputStream ois = new ObjectInputStream(new FileInputStream(file));
ArrayList<Express> list = (ArrayList<Express>) ois.readObject();
ois.close();
//根据取件码定位快递信息
for (Express e : list
) {
if (e.getCode() == code) {
text.append("位置: " + list.indexOf(e) + " ," + "快递信息:" + e.toString());
list.remove(e);//将此快递删除
//序列化
ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(file));
oos.writeObject(list);
oos.close();
return text;//返回此快递信息
}
}
return text.append("未找到");//如果没有则返回未找到
}
//查看所有快递
public ArrayList<Express> show() throws IOException, ClassNotFoundException {
File file = new File("g:\\Express.txt");
file.createNewFile();
//反序列化
ObjectInputStream ois = new ObjectInputStream(new FileInputStream(file));
ArrayList<Express> list = (ArrayList<Express>) ois.readObject();
ois.close();
return list;//返回快递信息的集合
}
}
3.服务器：与客户端交流并存储信息到本地
public class Server {
public static void main(String[] args) throws IOException, ClassNotFoundException {
ServerSocket serverSocket = new ServerSocket(65534);
Manage m = new Manage();
w1:
while (true) {
//等待连接
Socket socket = serverSocket.accept();
InputStream is = socket.getInputStream();
int x = is.read();//接收客户端传过来的序号
//功能选择
switch (x) {
case 0: {
BufferedReader br = new BufferedReader(new InputStreamReader(is));
//服务器关闭
if (br.readLine().equals("程序结束")) {
br.close();
break w1;
}
}
case 1: {
ObjectInputStream ois = new ObjectInputStream(is);
//接收到的一个集合形式的快递信息
ArrayList<Express> list = (ArrayList<Express>) ois.readObject();
ois.close();
m.save(list);//保存到本地文件
break;
}
case 2: {
BufferedReader br = new BufferedReader(new InputStreamReader(is));
int code = Integer.valueOf(br.readLine());//读取返回的是String类型的取件码,读取其中的数字;
StringBuffer text = m.take(code);//取出快递信息;
br.close();
socket = serverSocket.accept();
OutputStream os = socket.getOutputStream();
PrintStream ps = new PrintStream(os);
ps.println(text);//将快递信息发给客户端
ps.close();
break;
}
case 3: {
is.close();
socket = serverSocket.accept();
OutputStream os = socket.getOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(os);
oos.writeObject(m.show());//将快递信息以集合形式发给客户端
oos.close();
break;
}
}
}
}
}
4.客户端：用户操作界面
public class Client {
public static void main(String[] args) throws IOException, ClassNotFoundException {
w1:
while (true) {
Socket socket = new Socket("127.0.0.1", 65534);
OutputStream os = socket.getOutputStream();
try {
System.out.println("输入0结束,输入1录入快递,输入2取快递,输入3查看所有快递");
Scanner input = new Scanner(System.in);
int x = input.nextInt();
//将序号发给服务器,功能一一对应;
os.write(x);
switch (x) {
//结束程序
case 0: {
PrintStream ps = new PrintStream(os);
ps.println("程序结束");
ps.close();
break w1;//跳出while循环
}
case 1: {
ObjectOutputStream oos = new ObjectOutputStream(os);
oos.writeObject(new Manage().addExpress());//创建快递信息并将此信息发给服务器
oos.close();
break;
}
case 2: {
System.out.println("请输入取件码");
PrintStream ps = new PrintStream(os);
ps.println(input.nextInt());//将取件码传给服务器
ps.close();
socket = new Socket("127.0.0.1", 65534);
InputStream is = socket.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
System.out.println(br.readLine());//读取由服务器传过来的快递信息
br.close();
break;
}
case 3: {
os.close();
socket = new Socket("127.0.0.1", 65534);
InputStream is = socket.getInputStream();
ObjectInputStream ois = new ObjectInputStream(is);
ArrayList<Express> list = (ArrayList<Express>) ois.readObject();//服务器将快递信息以集合的形式传过来;
ois.close();
//遍历
for (Express e :
list) {
System.out.println(e.toString());
}
break;
}
}
} catch (Exception e) {
System.out.println("操作有误");
continue w1;
}
}
}
}
5.运行效果
